But that's the point though, it's not trying to solve anything. The biological impetus to survive is individual, and we see some emergent property of survival instincts in the development and existence of groups, societies, culture, etc. In non-human animals, there are lots of example of cooperation and symbiosis. All this to say that problem solving is a biological problem, not an evolutionary problem. There are pressures that favor some traits over others, and then we have population level effects, but the development of traits is inherently random.